noun, Metalworking. 1. an extrusion process in which a slug of cold metal in a shallow die cavity is formed by the action of a rapidly moving punch that forces the metal through the die or back around the punch.

[im-pakt-fuh l] /ɪmˈpækt fəl/ adjective 1. having or manifesting a great impact or effect: After the senator’s impactful speech, her bill passed. /ˈɪmpæktfʊl/ adjective 1. having a powerful effect or making a strong impression: a thoughtful and impactful display of contemporary art adjective having a great impact or effect adj. 1968, from impact + -ful. […]

[noun im-pakt; verb im-pakt] /noun ˈɪm pækt; verb ɪmˈpækt/ noun 1. the striking of one thing against another; forceful contact; collision: The impact of the colliding cars broke the windshield. 2. an impinging: the impact of light on the eye. 3. influence; effect: the impact of Einstein on modern physics. 4. an impacting; forcible impinging: […]

[im-pak-shuh n] /ɪmˈpæk ʃən/ noun 1. an act or instance of . 2. the state of being ; close fixation. 3. Dentistry. the condition in which a tooth is . n. 1739, from Latin impactionem (nominative impactio) “a striking against,” noun of action from past participle stem of impingere (see impinge). impaction im·pac·tion (ĭm-pāk’shən) n. […]

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